1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
#!/bin/sh
# ============LICENSE_START=======================================================
# org.onap.vvp/image-scanner
# ===================================================================
# Copyright © 2017 AT&T Intellectual Property. All rights reserved.
# ===================================================================
#
# Unless otherwise specified, all software contained herein is licensed
# under the Apache License, Version 2.0 (the “License”);
# you may not use this software except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#
#
# Unless otherwise specified, all documentation contained herein is licensed
# under the Creative Commons License, Attribution 4.0 Intl. (the “License”);
# you may not use this documentation except in compliance with the License.
# You may obtain a copy of the License at
#
# https://creativecommons.org/licenses/by/4.0/
#
# Unless required by applicable law or agreed to in writing, documentation
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# ============LICENSE_END============================================
#
# ECOMP is a trademark and service mark of AT&T Intellectual Property.
#
set -e
usage() {
cat <<-EOF
Usage: $0 DISK_IMAGE
Mount DISK_IMAGE and scan it, optionally decompressing first.
DISK_IMAGE must be a qcow or raw disk image.
GZip-compressed images will be decompressed in-place.
Environment variable IMAGESCANNER_MOUNTPOINT controls where the image
will be mounted while scan is in progress.
EOF
}
scan_image_dir() {
clamscan -r "$1"
return $?
}
image="$1"
[ "$IMAGESCANNER_MOUNTPOINT" ] || export IMAGESCANNER_MOUNTPOINT="/mnt/imagescanner"
[ -d "$IMAGESCANNER_MOUNTPOINT" ] || mkdir -p "$IMAGESCANNER_MOUNTPOINT"
[ -e "$image" ] || {
echo "Error: image not found: $image"
exit 1
}
if [ "${image##*.}" = "gz" ]; then
echo "Decompressing image $image..."
gunzip "$image"
image="${image%.gz}"
fi
# Hueristic for determining image type:
# 1. ask "file"
# 2. failing that, check file extension
echo "Detecting image type for $image..."
detectedtype="$(file -b $image)"
case "$detectedtype" in
"QEMU QCOW Image"*) imagetype=qcow ;;
"ISO 9660 CD-ROM"*) imagetype=iso ;;
"DOS/MBR boot sector"*) imagetype=img ;; # "isohybrid" bootable CD / disk image
*) echo "Could not detect image type by inspection; guessing by extension..."
# unknown string from 'file'; try by extension
case "${image##*.}" in
"qcow"|"qcow2") imagetype=qcow ;;
"iso") imagetype=iso ;;
"img") imagetype=img ;;
*)
echo "Error: $image has unknown image type: $detectedtype"
exit 3
;;
esac
;;
esac
echo "Detected $detectedtype: $imagetype"
status=0
case "$imagetype" in
qcow)
echo "Processing qcow image $image..."
qemu-nbd -rc /dev/nbd0 "$image"
partitions=$(kpartx -ravs /dev/nbd0 | cut -d' ' -f3)
for partition in $partitions
do
[ -e "/dev/mapper/$partition" ] || continue # nullglob
echo "Mounting qcow partition $image/$partition..."
mount -o ro "/dev/mapper/$partition" "$IMAGESCANNER_MOUNTPOINT"
echo "Scanning mounted image..."
scan_image_dir "$IMAGESCANNER_MOUNTPOINT" || status=$?
echo "Unmounting..."
umount "$IMAGESCANNER_MOUNTPOINT"
done
echo "Disconnecting NBD device..."
dmsetup remove $partitions
kpartx -vd /dev/nbd0
qemu-nbd -d /dev/nbd0
;;
img)
echo "Processing raw image $image..."
partitions=$(kpartx -ravs $image | cut -d' ' -f3)
for partition in $partitions
do
[ -e "/dev/mapper/$partition" ] || continue # nullglob
echo "Mounting raw image partition $image/$partition..."
mount -o ro "/dev/mapper/$partition" "$IMAGESCANNER_MOUNTPOINT"
echo "Scanning mounted image..."
scan_image_dir "$IMAGESCANNER_MOUNTPOINT" || status=$?
echo "Unmounting..."
umount "$IMAGESCANNER_MOUNTPOINT"
done
echo "Disconnecting loopback device..."
# this is unnecessary on my host; why is it needed in a container?
dmsetup remove $partitions
kpartx -vd $image
;;
iso)
echo "Processing iso image $image..."
mount -o loop,ro "$image" "$IMAGESCANNER_MOUNTPOINT"
echo "Scanning mounted image..."
scan_image_dir "$IMAGESCANNER_MOUNTPOINT" || status=$?
echo "Unmounting..."
umount "$IMAGESCANNER_MOUNTPOINT"
;;
esac
echo "Done scanning $image."
if [ "$status" != "0" ]; then
echo "WARNING: A scan reported a failure result."
exit $status
fi
|
